纳米粒子掺杂的有机-无机杂化光折变材料。

Nanoparticle doped organic-inorganic hybrid photorefractives.

作者信息

Cook G, Glushchenko A V, Reshetnyak V, Griffith A T, Saleh M A, Evans D R

机构信息

Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH, USA.

出版信息

Opt Express. 2008 Mar 17;16(6):4015-22. doi: 10.1364/oe.16.004015.

DOI:10.1364/oe.16.004015

PMID:18542499

Abstract

The gain characteristics of liquid crystal photorefractive cells doped with ferroelectric nanoparticles has been measured. The liquid crystal two beam coupling gain is found to reverse in sign and increase in magnitude through the addition of ferroelectric BaTiO(3) nanoparticles, yielding gain coefficients up to 1100 cm(-3) in the Bragg regime. We attribute the novel effects of gain reversal and magnitude increase to interactions between the ferroelectric particles' spontaneous polarization and the local liquid crystal flexopolarization.

摘要

已测量了掺杂铁电纳米颗粒的液晶光折变细胞的增益特性。通过添加铁电BaTiO(3)纳米颗粒，发现液晶双光束耦合增益在符号上反转且幅度增加，在布拉格 regime 中产生高达1100 cm(-3)的增益系数。我们将增益反转和幅度增加的新效应归因于铁电颗粒的自发极化与局部液晶挠曲极化之间的相互作用。